【作者】 付国；

【导师】 刘鸣；

【作者基本信息】 长安大学 ， 结构工程， 2010， 硕士

【摘要】 高强不锈钢绞线网-渗透性聚合物砂浆加固、高性能复合砂浆钢筋网加固、高性能复合砂浆钢丝网加固等加固方法是近几年新兴的加固技术,该技术具有加固承载力提高大、施工简便、耐高温、耐久性好等突出优点。本文通过对这几种新型加固技术的深入研究,根据其加固方式、加固机理、计算理论的相似性,将其统称为“加筋高性能砂浆层加固技术(Reinforced High Performance Mortar)",在已完成的试验研究的基础上,完成了以下几个方面的工作。1、总结了近年来的RHPM加固研究,对各个试验的试验现象、过程、特点进行了简要的描述,分析了高强钢绞线-聚合物砂浆加固、高强钢丝绳-聚合物砂浆加固和高性能复合砂浆钢筋网加固的异同。提出了加筋高性能砂浆加固的施工流程,其中养护阶段对加固效果影响较大并且容易忽略,认为覆盖塑料薄膜法这种养护方法效果良好,施工容易。2、在理论分析的基础上通过对已完成的RHPM加固梁试验数据,提出了加固梁的抗弯承载力计算公式,包括开裂弯矩、屈服弯矩和极限弯矩的计算公式和极限弯矩的简化计算公式,通过对7组共90根加筋高性能砂浆加固梁数据的计算和验证,公式计算值与试验数据吻合良好,可用于工程实践。3、对比了RHPM直接加固和二次受力加固裂缝开展情况差异,采用RHPM加固的梁裂缝表现出宽度细而间距密、加固裂缝开展推迟、发展缓慢的特点。对现行的混凝土结构设计规范裂缝间距和宽度公式进行了修正,推导出适合RHPM加固梁的最大裂缝宽度和裂缝间距公式。4、详细分析了RHPM加固刚度提高的各因素：加固钢绞线(钢筋网、钢丝网)的用量、高强复合砂浆和钢绞线(钢筋网)的应变滞后。对比中英美三国规范、参照课题组完成公式,建立并完成了RHPM刚度计算公式。更多还原

【Abstract】 Reinforcement with stainless steel wire mesh and permeability polymer mortar and high performance ferrocement reinforcement are newly developing means of reinforcement in recent years. High strength, Prominent reinforcing effect, convenient to construct, high temperature resistance and aging and so on are the prominent advantages of such Reinforcement Technology. In this paper, through the thorough study on these new reinforcement methods and according to their Reinforcement approach, Reinforcement mechanism and Similarity theory of computation, these methods can be referred as Reinforced High Performance Mortar. Based on existing experiment, the following aspects of work are completedRecent studies on RHPM reinforcement were reviewed. The phenomenon, processes and characterized of these studies are briefly described. The similarities and differences between Reinforcement with stainless steel wire mesh and permeability polymer mortar and high performance ferrocement reinforcement was compared and analyzed. Consolidation process is proposed. Maintenance period impact greater on the reinforcing effect and is easy to be ignored. The conservation method of plastic film covering method leads to good effect and easy Construction.Through the existing large number of tests and data analysis, the formula of flexural capacity of reinforced concrete beams was proposed, including calculation formula and Simplified formula of computation cracking moment, yield moment and ultimate moment. Based on the calculation and verification of 90 sets of data from 7 groups reinforced concrete beams, the formula can be thought as good agreement with the experimental data and can be used for engineering practice.RHPM was able to effectively limit the generation of cracks and delay the development of cracks. Cracks of RHPM reinforced beam exhibits the feature of small and dense, later crack generation and slow development. By contrast on the crack generation situation of Direct reinforcement and strengthening of twice loading, through necessary amendments to the existing standard on the formula of crack spacing and width, Maximum crack width and crack spacing formula adequate for RHPM was derived.A large number of reinforcement experiment shows that RHPM can effectively improve the sectional stiffness and the overall stiffness of reinforced concrete beams. Stiffness improvement factors mainly contain the strain hysteresis of steel wire mesh (steel mesh) and high performance ferrocement. With the national standards and the formulas completed by national teams. the validation of the stiffness equation is finished.更多还原